ImportantheatexchangerprinciplesThe ability of any heat exchanger to transfer energy (heat) fromone material to another (or a different body of the same material)depends upon:> T he temperature difference between the two materials or bodies.Meaning, the greater the difference then the greater the heat flux (rate of energytransfer through a given surface).> T he amount of surface area of the two materials or bodies that are in contact witheach other (albeit through the medium of the heat exchanger material).That is the effective surface area of the heat exchanger itself.Meaning, the greater the area then the greater the rate of energy transferred.> he thermal conductivity of the heat exchanger material.TMeaning, the higher the thermal conductivity then the higher the heat flux.As one material or body is heated by the other then they approach the same (equilibrium)temperature. Introducing a flow of the two materials (in this case hot water and coolerair) or bodies through the heat exchanger ensures that a higher temperature differentialas possible is achieved.Increasing the flow rates of materials (water / air) that are to have heat exchangedbetween them, without increasing their contact surface areas (heat exchanger surfacearea) cannot produce significant performance gains.Increasing the flow rates of the materials (water / air) that are to have heat exchangedbetween them, without increasing the thermal conductivity of any separating medium(heat exchanger material) between them cannot produce significant performance gains.Therefore, the capacity of the heat exchanger to transfer energy and deliver a heat flux(from one medium or body of material) to another will depend upon both the effectivesurface area and the thermal conductivity of the material used in the heat exchanger.Ready for the future. Today.1213
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